#define THR   0x3F8
#define RBR   0x3F8
#define IER   0x3F9
#define LCR   0x3F8
#define MCR   0x3FC
#define LSR   0x3FD
#define MSR   0x3FE

#define B110  0x00
#define B150  0x20
#define B300  0x40
#define B600  0x60
#define B1200 0x80
#define B2400 0xA0
#define B4800 0xC0
#define B9600 0xE0

#define NO_PARITY    0x00
#define ODD_PARITY   0x08
#define EVEN_PARITY  0x18

#define STOP1  0x00
#define STOP2  0x04

#define DATA7  0x02
#define DATA8  0x03

#define COM1   0

#define salloc(x)     malloc(x) + (x) - 2
#define BUFSIZE 256
#define REC_LEN  84
#define ESC     0x1B
#define STDIN   0
#define STDOUT  1
#define STDERR  2
#define LINE_LENGTH 21
#define TRUE 1
#define FALSE 0
#define COLUMNS 80
#define ROWS 25
#define BELL_RINGS 30
#define ORIGIN_X 2
#define ORIGIN_Y 2
#define MPS2KNOT 1.968
#define ELLIPSE_71A 978031.85
#define ELLIPSE_71B 0.0053024
#define ELLIPSE_71C 0.0000359
#define DEG2RAD 0.0174532
#define FREE_AIR 0.3086
#define DISK_SIZE 20
#define FILE_SIZE 1110000.0
#define MAX_FILTER_LENGTH 512
#define BUFFER_SIZE 2048
#define DAY_LENGTH_SEC 86400
#define CENTURY 1900

#define CUR_MV(x,y) fprintf(stderr,"\33[%d;%dH",y,x)
#define CUR_UP(num) fprintf(stderr,"\33[%dA",num)
#define CUR_DN(num) fprintf(stderr,"\33[%dB",num)
#define CUR_RT(num) fprintf(stderr,"\33[%dC",num)
#define CUR_LT(num) fprintf(stderr,"\33[%dD",num)

#define CLR_SCRN fputs("\33[2J",stderr)
#define BELL fputc('\7',stderr)

	int initialize_input();
	int get_screen_input();
	int do_commands();
struct GRAV *get_grav();
	int reduce_gravity();
   long int log_data();
	int on_grav();
	int off_grav();
	int on_plot();
	int off_plot();
	int on_log();
	int off_log();
	int read_grav_flag();
       void command_error_message();
       void plot_data();
       void open_new_file();
	int gravity_buffer_check();
       void print_message();
       void ISR();
       void rs232_out();
       void rs232_init();
       void set_int();
       void clear_interrupt();
   long int time_get();
       void write_header();
	int date_get();
	int day_of_year();
       void write_status_string();
       void write_header_string();
       void calculate_filter_coefficients();

struct GRAV {
	 char raw_grav[13];
     long int counts;
     long int end_count_time;
	  int flag;
	  int num;
       double gravity;
  struct GRAV *next;
       } grav_1,grav_2;
  struct GRAV *begin_g,*end_g;

  struct PLOT {
	double grav;
	double wrap;
	int row;
	long int time;
	struct PLOT *next;
	} *first_point;

  struct PLOT *last_point;

  FILE *log_file;
  char meter_ID[25] ={ "Bell BGM-3 # 115" };